Chen C.-L., Wang C., Zheng X.-Y. et al. · Journal of the American Chemical Society · 2023 · 16983-16987
Open a family to keep every result attached to its sample, method and conditions.
Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.
Ln4-MOFs retain crystallinity and conductivity under aqueous acid/base treatment, boiling water, 100 C device operation, high electric field, and oxidising MnO4- exchange conditions.
Caveat: Long-term operating stability beyond the reported 10 h heating, 2 h high-field and 12 h pH soak was not tested for every condition.
3 · Stability evaluation · Figure 3 · Linked to 5 structured results
Single-crystal Gd4-MOF could not be effectively prepared as a gate-modulated FET because its large band gap prevents source-drain current modulation.
Caveat: Authors phrase this as a hypothesis supported by UV-vis band-gap measurement.
9 · Figure S11 text · Figures S11-S12 · Linked to 2 structured results
Shorter pi-pi stacking distance across the Ln4-MOF series correlates with higher c-axis conductivity, with Tm4-MOF as the best performer.
Caveat: Only three lanthanide analogues in this series; conductivity distributions are from multiple single-crystal devices.
3 · Conductivity tuning · Figure 2d · Linked to 7 structured results
Exceptional stability is attributed to strong Ln(III)-carboxylate coordination, low-pKa INA acid/base equilibria, local defect rebinding, zipper-like pi-pi stacking and hydrogen bonding.
Caveat: This is a mechanistic rationale rather than a separately quantified kinetic study.
3 · Stability mechanism · Linked to 3 structured results
CF3SO3- channel anions are not the main source of c-axis conductivity because MnO4- exchange causes negligible conductivity change.
Caveat: Conductivity values are figure-estimated here; the paper states negligible change qualitatively.
15 · MnO4 anion exchange studies · Figure S26 · Linked to 3 structured results
Electrons transport primarily along pi-pi stacked pyridine/aromatic carbon rings in the c-axis direction rather than through the perpendicular a-axis path.
Caveat: Mechanism is inferred from anisotropy, DFT DOS, and anion-exchange control rather than direct carrier imaging.
2-3 · Transport mechanism · Figures 2b, S18 · Linked to 4 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Blank two-probe device without MOF crystal | Au electrodes on SiO2/Si without MOF crystal | unknown · Model SystemNo framework; electrical control substrate/device | 2 · Electrical measurement · Figure S13 |
| Gd4-MOF | {[Gd4(mu4-O)(mu3-OH)3(INA)3(GA)3](CF3SO3)(H2O)6}n; crystallographic formula C25H33N3Gd4O28SF3Cubane-like [Gd4(mu4-O)(mu3-OH)3]7+ building block forming inorganic {Gd4O4}n chains · isonicotinic acid/isonicotinate (INA) and glycolic acid/glycolate (GA) | 3D · PristineHexagonal P63mc; adjacent 1D chains linked by pi-pi stacking and hydrogen bonding; 1D channels | 1 · Abstract and structure discussion |
| Lu4-MOF | {[Lu4(mu4-O)(mu3-OH)3(INA)3(GA)3](CF3SO3)(H2O)6}n; crystallographic formula C25H33N3Lu4O28SF3Lanthanide [Lu4(mu4-O)(mu3-OH)3] cluster analogue within Ln4-MOF series · isonicotinic acid/isonicotinate (INA) and glycolic acid/glycolate (GA) | 3D · PristineHexagonal P63mc; isostructural with Gd4-MOF with intermediate pi-pi stacking distance | 3 · Conductivity tuning · Figure 2c,d |
| Tm4-MOF | {[Tm4(mu4-O)(mu3-OH)3(INA)3(GA)3](CF3SO3)(H2O)6}n; crystallographic formula C25H33N3Tm4O28SF3Lanthanide [Tm4(mu4-O)(mu3-OH)3] cluster analogue within Ln4-MOF series · isonicotinic acid/isonicotinate (INA) and glycolic acid/glycolate (GA) | 3D · PristineHexagonal P63mc; isostructural with Gd4-MOF with shorter pi-pi stacking distance | 3 · Conductivity tuning · Figure 2c,d |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| blank device fabricated without MOF crystalresearch_0780__mat__blank_device_no_mof | Electrode · Pristine Control · Model | same device fabrication as crystal device but without crystals290 nm SiO2/Si wafer with Au electrodes, no transferred single crystal | 2 · Electrical measurement · Figure S13 |
| as-synthesised Gd4-MOF single crystalsresearch_0780__mat__gd4_mof | Single Crystal · Target Sample · Pristine Framework | solvothermal product, colourless rod-like crystalsnone for bulk characterisation; transferred to 290 nm SiO2/Si for device images · rod-like crystals; c-axis length several tens of micrometers; SEM scale bar 10 um | 1 · Synthesis summary · Figures 1e and S1a |
| Gd4-MOF single-crystal two-probe device, a-axis alignedresearch_0780__mat__gd4_mof | Electrode · Target Sample · Pristine Framework | single crystal contacted so voltage was applied across the a-axis290 nm SiO2/Si wafer with 50 nm Au electrodes and silver paste contacts · individual crystal dimensions measured optically | 2 · Electrical anisotropy · Figure 2b |
| Gd4-MOF single-crystal two-probe device, c-axis alignedresearch_0780__mat__gd4_mof | Electrode · Target Sample · Pristine Framework | single crystal transferred between Au electrodes; c-axis aligned with electrode pair; silver paste dried 2 h290 nm SiO2/Si wafer with 50 nm Au electrodes and silver paste contacts · source-drain distance about 50 um in high-field test; individual crystal dimensions measured optically | 2-3 · Device fabrication · Figures S9-S10 |
| Gd4-MOF after MnO4- anion exchangeresearch_0780__mat__gd4_mof | Single Crystal · Target Sample · Guest Loaded | Gd4-MOF crystals exposed to 50 ppm aqueous KMnO4 for seven days, then centrifuged and washednone during exchange; measured as single-crystal device after exchange · optical image scale bar 10 um | 15 · MnO4 anion exchange studies · Figure S26 |
| as-synthesised Lu4-MOF single crystalsresearch_0780__mat__lu4_mof | Single Crystal · Target Sample · Pristine Framework | solvothermal product, colourless rod-like crystalsnone for bulk characterisation; 290 nm SiO2/Si wafer in optical image · rod-like crystals; optical image scale bar 50 um | 4 · Figure captions · Figure S1 |
| Lu4-MOF single-crystal two-probe device, c-axis alignedresearch_0780__mat__lu4_mof | Electrode · Target Sample · Pristine Framework | single crystal aligned along electrode pair and contacted with silver paste290 nm SiO2/Si wafer with 50 nm Au electrodes and silver paste contacts · individual crystal dimensions measured optically | 3 · Conductivity tuning · Figure 2d |
| as-synthesised Tm4-MOF single crystalsresearch_0780__mat__tm4_mof | Single Crystal · Target Sample · Pristine Framework | solvothermal product, colourless rod-like crystalsnone for bulk characterisation; 290 nm SiO2/Si wafer in optical image · rod-like crystals; optical image scale bar 50 um | 4 · Figure captions · Figure S1 |
| Tm4-MOF single-crystal two-probe device, c-axis alignedresearch_0780__mat__tm4_mof | Electrode · Target Sample · Pristine Framework | single crystal aligned along electrode pair and contacted with silver paste290 nm SiO2/Si wafer with 50 nm Au electrodes and silver paste contacts · individual crystal dimensions measured optically | 3 · Conductivity tuning · Figure 2d |